qemu build fails on -current

["John D. Baker" <jdbaker%consolidated.net@localhost>]

While rebuilding packages with 9.99.106/amd64, "qemu" fails with:

[...]
FAILED: pc-bios/keymaps/ar 
/usr/pkg/bin/qemu-keymap -f pc-bios/keymaps/ar -l ar
xkbcommon: ERROR: failed to add default include path /usr/X11R7/share/X11/xkb
ninja: build stopped: subcommand failed.
*** Error code 1

Stop.
make[1]: stopped in /x/pkgsrc/emulators/qemu
*** Error code 1

Stop.
make: stopped in /x/pkgsrc/emulators/qemu


The path "/usr/X11R7/share/X11/xkb" doesn't exist.  I think I saw another
package get fixed to correct this problem, but "emulators/qemu" seems to
need similar attention.

The last time "qemu" built successfully for me appears to be 9.99.99.
All with pkgsrc-2022Q3 (or -HEAD just prior to the branch).

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